konversation: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/konversation - from package: konversation

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/konversation - from package: konversation

You may install the required package with command apt-get install {package}

Error in other languages:
konversation: bevel nie gevind nie
konversation: comandă negăsită
konversation: comando não encontrado
konversation: commande introuvable
konversation: command not found
konversation: käsku ei ole
konversation: không tìm thấy lệnh
konversation: komanda nerasta
konversation: Kommando nicht gefunden.
konversation: kommandot finns inte
konversation: komut yok
konversation: nie znaleziono polecenia
konversation: níor aimsíodh an t-ordú
konversation: no se encontró la orden
konversation: no s'ha trobat l'ordre
konversation: opdracht niet gevonden
konversation: parancs nem található
konversation: perintah tidak ditemukan
konversation: príkaz nenájdený
konversation: příkaz nenalezen
konversation: команда не найдена
konversation: командата не е открита
konversation: 命令找不到
konversation: コマンドが見つかりません